//The contents of this file are subject to the Mozilla Public License Version 1.1
//(the "License"); you may not use this file except in compliance with the
//License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
//
//Software distributed under the License is distributed on an "AS IS" basis,
//WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
//for the specific language governing rights and
//limitations under the License.
//
//The Original Code is "The Columba Project"
//
//The Initial Developers of the Original Code are Frederik Dietz and Timo Stich.
//Portions created by Frederik Dietz and Timo Stich are Copyright (C) 2003.
//
//All Rights Reserved.
package org.columba.mail.gui.tree.action;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.KeyStroke;

import org.columba.api.gui.frame.IFrameMediator;
import org.columba.mail.command.MailFolderCommandReference;
import org.columba.mail.folder.IMailFolder;
import org.columba.mail.gui.frame.MailFrameMediator;
import org.columba.mail.gui.frame.TreeViewOwner;
import org.columba.mail.gui.tree.FolderTreeModel;
import org.columba.mail.util.MailResourceLoader;

/**
 * Move selected folder down for one row.
 * <p>
 * 
 * @author fdietz
 * @author redsolo
 */
public class MoveDownAction extends AbstractMoveFolderAction {
	/**
	 * @param frameMediator
	 *            the frame controller.
	 */
	public MoveDownAction(IFrameMediator frameMediator) {
		super(frameMediator, MailResourceLoader.getString("menu", "mainframe",
				"menu_folder_movedown"));
		setEnabled(false);

		// shortcut key
		putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_DOWN,
				ActionEvent.ALT_MASK));
	}

	/**
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 */
	public void actionPerformed(ActionEvent arg0) {
		MailFolderCommandReference r = (MailFolderCommandReference) ((MailFrameMediator) frameMediator)
				.getTreeSelection();

		IMailFolder folder = (IMailFolder) r.getSourceFolder();

		int newIndex = folder.getParent().getIndex(folder);
		newIndex = newIndex + 1;
		((IMailFolder) folder.getParent()).insert(folder, newIndex);

		FolderTreeModel.getInstance().nodeStructureChanged(folder.getParent());

		// select folder again after move operation
		((TreeViewOwner) frameMediator).getTreeController().setSelected(folder);
	}

	/** {@inheritDoc} */
	protected boolean isActionEnabledByIndex(int folderIndex) {
		return (folderIndex < (getLastSelectedFolder().getParent()
				.getChildCount() - 1));
	}
}